NKT....Click (beating the mouth).
LMAO.....laughing my ass off (If you have one).
ROTFLMAO....(You got it wrong but all the same...Rolling on the floor,laughing my ass off (If you have a spare ass).
OMDB......Ooh my dear buttocks (I am lying).
ABK.......Absolutely bure kabisa (BK...Bure kabisa).
and since it's a Friday and i am feeling philanthropic, i add you this;
GNN.....Gutheka Nginya Ngathuria.
Nothing great was ever achieved without enthusiasm.